20MnCr5 vs 51CrMoV4: 38% composition overlap. Significantly different materials serving different application areas.
20MnCr5 vs 51CrMoV4
Side-by-side chemical composition and mechanical property comparison.
Overview
20MnCr5
1.7147
Manganese-chromium case-hardening steel with higher core strength than 16MnCr5. Used for heavily loaded gears, shafts, camshafts, and transmission components requiring high surface hardness with tough core. Popular in automotive and heavy machinery.
51CrMoV4
1.7701
CrMoV alloyed spring steel — THE European automotive suspension spring material. CrMo gives deep hardenability for large coil springs, V adds grain refinement and secondary hardening for fatigue resistance. UTS 1350-1600 MPa QT. Used for hot-formed coil springs (cars, trucks), leaf springs, torsion bars, and stabilizer bars. Excellent sag resistance to 200°C.
| 20MnCr5 | 51CrMoV4 | |
|---|---|---|
| Material Number | 1.7147 | 1.7701 |
| Category | Alloy Steel | Alloy Steel |
| Standard | EN 10084 | EN 10089 |
Chemical composition (wt%)
| Element | 20MnCr5 | 51CrMoV4 | Overlap |
|---|---|---|---|
| C | 0.17–0.22% | 0.47–0.55% | No overlap |
| Si | 0–0.4% | 0–0.4% | OK |
| Mn | 1.1–1.4% | 0.7–1% | No overlap |
| P | 0–0.025% | — | — |
Mechanical properties
| Property | 20MnCr5 | 51CrMoV4 | Unit |
|---|---|---|---|
| hardness_hrc | 58–62 | — | HRC |
| tensile_strength | 900–1200 | 1350–1600 | MPa |
| hardness_hb | ≤ 217 | — | HB |
Compatibility Assessment
20MnCr5 and 51CrMoV4 have significantly different compositions (38% overlap). These materials are not interchangeable and serve different application areas.
Automated assessment based on composition analysis
Frequently Asked Questions
Is 20MnCr5 the same as 51CrMoV4?
20MnCr5 and 51CrMoV4 have a 38% composition overlap. They are generally not directly interchangeable.
Can I replace 20MnCr5 with 51CrMoV4?
Generally not recommended. The compositions differ significantly (38% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between 20MnCr5 and 51CrMoV4?
The main differences are in the following elements: C, Mn, Cr. 20MnCr5 is a Alloy Steel grade, while 51CrMoV4 is a Alloy Steel grade.
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Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.